气体的收集方式决定于气体的性质,尤其是气体的物理性质(如密度、水溶性等)。其收集的装置一般有两大类三种形式,即如图1、图2的排气集气装置[根据气体的密度可分为向上排气(图1)和向下排气(图2)]和图3的排水集气装置。这些装置似乎毫无奇特之处,如果我们将它们“改造”成如图4 The way the gas is collected depends on the nature of the gas, especially the physical properties of the gas (such as density, water solubility, etc.). The collected devices generally have two major types of three forms, namely, the exhaust gas gathering devices shown in FIGS. 1 and 2 [upward exhaust (FIG. 1) and downward exhaust (FIG. 2) according to the gas density. ] and Figure 3 drainage drainage device. These devices do not seem strange, if we “rebuild” them into Figure 4